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33745338631
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note
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10b
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0029045566
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33745428171
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note
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We arbitrarily chose to pursue the (S)-enantiomer of 7 by using (S)-t-Bu PHOX as the ligand. In practice (R)-t-Bu PHOX is reasonably expensive.
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20
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0032569909
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33745410280
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note
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Without the use of a Parr apparatus, little or no oxidation was observed, presumably due to problems with molecular oxygen uptake by the solvent.
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22
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0042436008
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Thomas, A. F.; Ozainne, M.; Guntz-Dubini, R. Can. J. Chem. 1980, 58, 1810-1820.
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33745388265
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note
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The ee of enone 6 could be upgraded to 97% ee by preparation, recrystallization, and hydrolysis of its semicarbazone derivative i. For the experiment shown, a collection of multiple batches of 6 was used that had a composite ee of 83%. See Supporting Information for further details. (Diaghram Presented)
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24
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33745404745
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note
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The relative stereochemistry was confirmed by X-ray crystallography. See Supporting Information for details.
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0037165401
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Pettus, T.R.R.4
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